How To Install and Boot Microsoft Windows Server 2019 from Persistent Memory

How To Install and Boot Microsoft Windows Server 2019 from Persistent Memory

In a previous post  I described how to install and boot Fedora Linux using only Persistent Memory, no SSDs are required. For this follow on post, I attempted to install Microsoft Windows Server 2019 and 2022 onto the persistent memory.

TL;DR - I was able to select the PMem devices as the install disk, but when the installer begins to write data, we get an “Error code: 0xC0000005”. I haven’t found a solution to this problem (yet).

Create a Bootable USB

Follow the instructions in my previous blog where I document How to Create a Bootable Windows USB in Fedora Linux .

Install Windows 2019

The first setup screen you’ll see when booting from the ISO or USB image allows you to select the installation language, Time and keyboard layout. Click “Next“ once you have confirmed your choices.

Click “Install Now” to begin the installation process

Select the Windows Server 2019 edition to install and click Next. If you’re not sure what edition you need, read the Comparison of Standard and Datacenter editions of Windows Server 2019 .

Read and accept the EULA License terms

Select ‘Custom: Install Windows only (Advanced)’

Select a disk or partition to install Windows Server, you can optionally create a new one from the available capacity or use all the available capacity by clicking “Next“. I found the 60GB PMem Devices listed towards the end as ‘Drive 6’ and ‘Drive 7’. Unfortunately, there’s no way to obtain information about the device, so you have to identify using the capacity.

Shortly into the installation, I encountered error 0xC0000005.

Most search results for this error during install indicate “The error halts the Windows OS installation and is mostly related to temporary hardware issues with the RAM or corrupt hard drive due to bad sectors.” I know the RAM and PMem is good, and I verified the USB image installs to an SSD without any issues.

Debugging the Install Error

To get a command prompt, press ‘OK’ in the error message -> Repair PC -> Troubleshoot -> Command Prompt.

I found a Microsoft Document that gave me some folders to look at for install/setup error. The following error was reported in X:\Windows\panther\setuperr.log

2021-06-14 18:12:22, Error [0x060126] IBS CallBack_ImageWasSelectedInUI: An error occurred while removing the MultiEdition key from the blackboard.[gle=0x000000490]
2021-06-14 18:13:35, FatalError [0x090001] PANTHR Exception (code 0xC0000005: ACCESS_VIOLATION) occurred at 0x00007FFF19A1CB96 in X:\Sources\Winsetup.dll (+000000000009CB96). Minidump attached (86929 bytes) to diagerr.xml and X:\windows\panther\mndD4C3.diagerr.mdmp.

If I get some free cycles, I’ll continue to debug the problem. If you have any suggestions, please leave me a comment.

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CXL Memory NUMA Node Mapping with Sub-NUMA Clustering (SNC) on Linux

CXL Memory NUMA Node Mapping with Sub-NUMA Clustering (SNC) on Linux

CXL (Compute Express Link) memory devices are revolutionizing server architectures, but they also introduce new NUMA complexity, especially when advanced memory configurations, such as Sub-NUMA Clustering (SNC), are enabled. One of the most confusing issues is the mismatch between NUMA node numbers reported by CXL sysfs attributes and those used by Linux memory management tools.

This blog post walks through a real-world scenario, complete with command outputs and diagrams, to help you understand and resolve the CXL NUMA node mapping issue with SNC enabled.

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How to Build acpidump from Source and use it to Debug Complex CXL and PCI Issues

How to Build acpidump from Source and use it to Debug Complex CXL and PCI Issues

This article is a detailed guide on how to build the latest version of the acpidump tool from its source code. While many Linux distributions, like Ubuntu, offer a packaged version of this utility, it’s often outdated. For developers and enthusiasts working with modern hardware features, particularly those related to Compute Express Link (CXL), having the most current version is essential.

Before you begin, it’s important to remove any old, conflicting versions of the tools. If you have previously installed the acpica-tools package from your distribution’s repository, you should remove it to prevent conflicts.

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How To Emulate CXL Devices using KVM and QEMU

How To Emulate CXL Devices using KVM and QEMU

What is CXL?

Compute Express Link (CXL) is an open standard for high-speed central processing unit-to-device and CPU-to-memory connections, designed for high-performance data center computers. CXL is built on the PCI Express physical and electrical interface with protocols in three areas: input/output, memory, and cache coherence.

CXL is designed to be an industry open standard interface for high-speed communications, as accelerators are increasingly used to complement CPUs in support of emerging applications such as Artificial Intelligence and Machine Learning.

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